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NSA releases pre-PRISM leak emails from Edward Snowden

Agency says Snowden's claim to have alerted superiors to his concerns is false

The National Security Agency (NSA) has released an email that it says distances it from Edward Snowden's claims that he voiced his concerns on the legality of the PRISM spying programme before turning to the media to expose it.

"The email did not raise allegations or concerns about wrongdoing or abuse, but posed a legal question that the Office of General Counsel addressed. There was not additional follow-up noted.

"There are numerous avenues that Mr Snowden could have used to raise other concerns or whistleblower allegations. We have searched for additional indications of outreach from him in those areas and to date have not discovered any engagements related to his claims."

"I would say one of my final official acts in government was continuing one of these communications with a legal office," he said. "I'm so sure that these communications exist that I've called on Congress to write a letter to the NSA to verify that they do."

"If the White House is interested in the whole truth, rather than the NSA's clearly tailored and incomplete leak today for a political advantage, it will require the NSA to ask my former colleagues, management, and the senior leadership team about whether I, at any time, raised concerns about the NSA's improper and at times unconstitutional surveillance activities. It will not take long to receive an answer."